diff --git a/src/keyboard_input/input_parser.cpp b/src/keyboard_input/input_parser.cpp
index 3fe16e5..ecbdd17 100644
--- a/src/keyboard_input/input_parser.cpp
+++ b/src/keyboard_input/input_parser.cpp
@@ -57,6 +57,8 @@ std::optional<Token> getFunctionNumber( const char& character )
     }
 }
 
+std::optional<Token> checkIfLegalCapitalLiteral( std::string input ) {}
+
 std::vector<Token> ParseKeyboardInputsToTokens( const std::string inputs )
 {
     std::vector<Token> tokens{};
@@ -106,6 +108,16 @@ std::vector<Token> ParseKeyboardInputsToTokens( const std::string inputs )
                 break;
             }
         }
+
+        std::string characters = "";
+        characters.push_back( *ch );
+        while ( auto a = checkIfLegalCapitalLiteral( characters ) )
+        {
+        }
+        // while not recognized character
+        // ++ch
+        // if end break
+        // add token
     }
 
     return tokens;
diff --git a/test/keyboard_input/tst_parsertest.cpp b/test/keyboard_input/tst_parsertest.cpp
index 8279a9a..eef2bc0 100644
--- a/test/keyboard_input/tst_parsertest.cpp
+++ b/test/keyboard_input/tst_parsertest.cpp
@@ -28,6 +28,8 @@ private slots:
     void shouldExitEarlyFunctionKey();
 
     void releaseHeldKeys();
+
+    void capitalLiterals();
 };
 
 const std::string alphabet = "abcdefghijklmnopqrstuvxyz";
@@ -195,6 +197,93 @@ void ParserTest::releaseHeldKeys()
     QVERIFY( t == e );
 }
 
+void ParserTest::capitalLiterals()
+{
+    auto t = ParseKeyboardInputsToTokens( "BACKSPACE" );
+    auto e = std::vector<Token>( { Token::KEY_BACKSPACE } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "SPACE" );
+    e = std::vector<Token>( { Token::KEY_SPACE } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "TAB" );
+    e = std::vector<Token>( { Token::KEY_TAB } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "ESC" );
+    e = std::vector<Token>( { Token::KEY_ESC } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "INS" );
+    e = std::vector<Token>( { Token::KEY_INS } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "DEL" );
+    e = std::vector<Token>( { Token::KEY_DEL } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "END" );
+    e = std::vector<Token>( { Token::KEY_END } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "PGDN" );
+    e = std::vector<Token>( { Token::KEY_PGDN } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "PGUP" );
+    e = std::vector<Token>( { Token::KEY_PGUP } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "CAPS" );
+    e = std::vector<Token>( { Token::KEY_CAPS } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "PRNSCRN" );
+    e = std::vector<Token>( { Token::KEY_PRNSCRN } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "PAUSE" );
+    e = std::vector<Token>( { Token::KEY_PAUSE } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "SCRLOCK" );
+    e = std::vector<Token>( { Token::KEY_SCRLOCK } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "LEFTARROW" );
+    e = std::vector<Token>( { Token::KEY_LEFTARROW } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "RIGHTARROW" );
+    e = std::vector<Token>( { Token::KEY_RIGHTARROW } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "UPARROW" );
+    e = std::vector<Token>( { Token::KEY_UPARROW } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "DOWNARROW" );
+    e = std::vector<Token>( { Token::KEY_DOWNARROW } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "KPSLASH" );
+    e = std::vector<Token>( { Token::KEY_KPSLASH } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "KPSTAR" );
+    e = std::vector<Token>( { Token::KEY_KPSTAR } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "KPMINUS" );
+    e = std::vector<Token>( { Token::KEY_KPMINUS } );
+    QVERIFY( t == e );
+
+    t = ParseKeyboardInputsToTokens( "KPPLUS" );
+    e = std::vector<Token>( { Token::KEY_KPPLUS } );
+    QVERIFY( t == e );
+}
+
 QTEST_APPLESS_MAIN( ParserTest )
 
 #include "tst_parsertest.moc"